CN202720425U - Liquid crystal display (LCD) panel and display device - Google Patents
Liquid crystal display (LCD) panel and display device Download PDFInfo
- Publication number
- CN202720425U CN202720425U CN 201220325347 CN201220325347U CN202720425U CN 202720425 U CN202720425 U CN 202720425U CN 201220325347 CN201220325347 CN 201220325347 CN 201220325347 U CN201220325347 U CN 201220325347U CN 202720425 U CN202720425 U CN 202720425U
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- Prior art keywords
- thin film
- film transistor
- static
- ito
- liquid crystal
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 29
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010409 thin film Substances 0.000 claims description 66
- 239000000758 substrate Substances 0.000 claims description 28
- 239000010408 film Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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- Liquid Crystal (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
The utility model discloses a liquid crystal display (LCD) panel and a display device and belongs to the technical field of display. The LCD panel comprises anti-static indium zinc oxide and indium tin oxide (ITO), wherein the anti-static indium zinc oxide and ITO are arranged in a Pad area of the LCD panel. The anti-static ITO is covered on a drive signal line of an integrated circuit (IC). The LCD panel and the display device are connected with the anti-static ITO and a public electrode of an array base plate through the net-shaped anti-static ITO which is arranged on the Pad area of the panel, and an anti-static protective return circuit, so that the LCD panel and the display device can effectively perform static protection of a corresponding line in the Pad area, are beneficial to improving yield of panels, and reduce possibility of static damage.
Description
Technical Field
The utility model relates to a show technical field, in particular to prevent liquid crystal display panel and display device of static damage.
Background
In the TFT LCD (thin film transistor liquid crystal display) process, due to the existence of charged particles in the environment, the charged particles, once contacting the circuits in the TFT LCD panel, will generate point discharge, which will easily cause the panel lines and the thin film devices to be broken down, thereby reducing the display quality of the picture, such as bad display of bright lines, bright spots, etc. Some defects may be repaired in subsequent processes, and some defects may not be repaired. Even if repairable, costs are increased. The best method is to improve the yield and reduce the probability of electrostatic damage through process and technology improvement.
Fig. 1 is a schematic diagram of a conventional liquid crystal panel structure, as shown in fig. 1, a driving signal line of a gate IC, an array substrate common electrode lead and a color filter substrate common electrode lead are provided at an edge of a Pad region (an outer region of a display region boundary 200 in fig. 1) of a liquid crystal panel, and these lines are not covered by ITO (indium zinc oxide) on a CF (color filter substrate), are not shielded by static electricity, and are easily damaged by external static electricity.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The to-be-solved technical problem of the utility model is: a liquid crystal panel and a display device are provided to prevent static electricity from damaging the lines of a Pad area of the liquid crystal panel.
(II) technical scheme
In order to solve the above technical problem, the utility model provides a liquid crystal display panel, it includes: the anti-static indium zinc oxide ITO is arranged in a Pad area of the liquid crystal panel; the anti-static ITO covers a driving signal circuit of the gate IC.
Wherein, the anti-static ITO is of a net structure.
And the anti-static ITO is connected with a common electrode of the array substrate through an electrostatic protection circuit.
Wherein the electrostatic protection circuit comprises: a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, and a fifth thin film transistor;
the source electrode of the first thin film transistor, the grid electrode and the source electrode of the second thin film transistor and the source electrode of the third thin film transistor are connected with each other to form a first connecting point; the drain electrode of the first thin film transistor, the drain electrode of the fourth thin film transistor, and the gate electrode and the drain electrode of the fifth thin film transistor are connected with each other to form a second connection point; a gate electrode of the first thin film transistor, a drain electrode of the second thin film transistor, a gate electrode and a drain electrode of the third thin film transistor, a gate electrode and a source electrode of the fourth thin film transistor, and a source electrode of the fifth thin film transistor are connected to each other;
the first connecting point is connected with the anti-static ITO, and the second connecting point is connected with a common electrode of the array substrate; or,
the second connection point is connected with the anti-static ITO, and the first connection point is connected with a common electrode of the array substrate.
And the anti-static ITO also covers a common electrode lead of the array substrate and/or a common electrode lead of the color film substrate.
The utility model also provides a display device, it includes liquid crystal display panel.
(III) advantageous effects
The utility model discloses a liquid crystal display panel and display device sets up netted anti-static ITO through the Pad region at the panel to connect through preventing the electrostatic protection return circuit prevent the electrostatic ITO to and array substrate's common electrode can carry out electrostatic protection to the regional corresponding circuit of Pad effectively, is favorable to improving the panel yield, reduces the electrostatic damage probability.
Drawings
FIG. 1 is a schematic diagram of a conventional liquid crystal panel structure;
fig. 2 is a schematic diagram of a structure of a liquid crystal panel according to an embodiment of the present invention;
fig. 3 is a circuit diagram of an electrostatic protection circuit according to an embodiment of the present invention;
fig. 4 is an equivalent circuit diagram when the second thin film transistor or the third thin film transistor in the electrostatic protection circuit is broken down;
fig. 5 is an equivalent circuit diagram when the fourth thin film transistor or the fifth thin film transistor in the electrostatic protection circuit is broken down.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Fig. 2 is a schematic diagram of a liquid crystal panel structure according to an embodiment of the present invention, as shown in fig. 2, the liquid crystal panel includes an array substrate and a color film substrate, and an anti-static ITO101 is disposed in a Pad region (i.e., an outer region of a display region boundary 200) of the liquid crystal panel.
The anti-static ITO101 is mainly used for covering a driving signal line 102 of a gate IC 107, a common electrode lead 103 of the array substrate, and a common electrode lead 104 of the color filter substrate. Meanwhile, due to different or changed liquid crystal panel structures, other lines may be in the Pad region and are not covered by the ITO of the color film substrate, and at this time, in order to protect the lines from being damaged by static electricity, the shape or position of the anti-static ITO101 should be appropriately changed to perform corresponding protection.
As shown in fig. 2, the anti-static ITO101 is in a mesh structure, so that the coupling capacitance thereof can be reduced, and the coupling capacitance can be prevented from affecting the circuit in the corresponding area.
Meanwhile, the anti-static ITO101 is further connected to a common electrode of the array substrate through an electrostatic protection circuit 105, so as to timely release static carried by the anti-static ITO 101.
Fig. 3 is a circuit diagram of an electrostatic protection circuit according to an embodiment of the present invention, as shown in fig. 3, the electrostatic protection circuit includes: a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, a fourth thin film transistor T4, and a fifth thin film transistor T5.
The source electrode of the first thin film transistor T1, the gate electrode and the source electrode of the second thin film transistor T2, and the source electrode of the third thin film transistor T3 are connected to each other to form a first connection point P; the drain electrode of the first thin film transistor T1, the drain electrode of the fourth thin film transistor T4, and the gate and drain electrodes of the fifth thin film transistor T5 are connected to each other to form a second connection point Q; the gate electrode of the first thin film transistor T1, the drain electrode of the second thin film transistor T2, the gate electrode and the drain electrode of the third thin film transistor T3, the gate electrode and the source electrode of the fourth thin film transistor T4, and the source electrode of the fifth thin film transistor T5 are connected to each other.
The first connection point P is connected with the anti-static ITO101, and the second connection point Q is connected with a common electrode of the array substrate; or the first connection point P is connected to a common electrode of the array substrate, and the second connection point Q is connected to the anti-static ITO 101.
Assuming that the first connection point P is connected to the anti-static ITO101 through a first signal line a1, and the second connection point Q is connected to the common electrode of the array substrate through a second signal line a2, the operation principle of the anti-static protection circuit 105 is briefly described as follows:
when static electricity is generated on the anti-static ITO101, the second thin film transistor T2, the third thin film transistor T3, the first thin film transistor T1, the fourth thin film transistor T4, and the fifth thin film transistor T5 are sequentially turned on, and at least two or more shunt paths are formed to conduct the static electricity to the common electrode of the array substrate. Wherein the shunt passage comprises: a 1- > T2 (T3) — > T4 (T5) — > a2, a 1- > T1- > a 2.
Meanwhile, in the electrostatic protection circuit 105, even if a part of the thin film transistors are broken down, the whole normal operation of the electrostatic protection circuit 105 is not affected.
For example, when the second thin film transistor T2 or the third thin film transistor T3 is broken down, the equivalent circuit is as shown in fig. 4, the gate of the first thin film transistor T1 is equivalent to being directly connected to the first signal line a1, and when static electricity is generated on the anti-static ITO101, the first thin film transistor T1, the fourth thin film transistor T4 and the fifth thin film transistor T5 are sequentially turned on to conduct the static electricity to the common electrode of the array substrate through the second signal line a 2.
If the fourth tft T4 or the fifth tft T5 breaks down, the equivalent circuit is as shown in fig. 5, at this time, the gate of the first tft T1 is equivalent to being directly connected to the second signal line a2, and when static electricity is generated on the anti-static ITO101, the second tft T2, the third tft T3 and the first tft T1 are sequentially turned on, so that the static electricity is conducted to the common electrode of the array substrate through the second signal line a 2.
Referring to fig. 2, due to the excellent characteristics of the anti-static electricity protection circuit 105, the electrostatic discharge is conducted at a plurality of places in the liquid crystal panel, such as connecting the common electrode of the array substrate and an electrostatic protection bus 108 through the anti-static electricity protection circuit 105, and connecting the data IC to the data IC
The data line 106 and the electrostatic protection bus line 108 are connected to the gate line from the gate IC 107 and the electrostatic protection bus line 108.
The utility model also provides an include liquid crystal display panel's display device, display device can be LCD TV, graphoscope or cell-phone display screen etc..
The embodiment of the utility model provides a liquid crystal display panel and display device sets up netted anti-static ITO through the Pad region at the panel to connect through preventing the electrostatic protection return circuit prevent the common electrode of electrostatic ITO and array substrate, can carry out electrostatic protection to the regional corresponding circuit of Pad effectively, be favorable to improving the panel yield, reduce the electrostatic damage probability.
The above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (6)
1. A liquid crystal panel, comprising: the anti-static indium zinc oxide ITO is arranged in a Pad area of the liquid crystal panel; the anti-static ITO covers a driving signal circuit of the gate IC.
2. The liquid crystal panel of claim 1, wherein the anti-static ITO has a mesh structure.
3. The liquid crystal panel of claim 1, wherein the anti-static ITO is connected to a common electrode of the array substrate through an electrostatic protection circuit.
4. The liquid crystal panel of claim 3, wherein the electrostatic protection circuit comprises: a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, and a fifth thin film transistor;
the source electrode of the first thin film transistor, the grid electrode and the source electrode of the second thin film transistor and the source electrode of the third thin film transistor are connected with each other to form a first connecting point; the drain electrode of the first thin film transistor, the drain electrode of the fourth thin film transistor, and the gate electrode and the drain electrode of the fifth thin film transistor are connected with each other to form a second connection point; a gate electrode of the first thin film transistor, a drain electrode of the second thin film transistor, a gate electrode and a drain electrode of the third thin film transistor, a gate electrode and a source electrode of the fourth thin film transistor, and a source electrode of the fifth thin film transistor are connected to each other;
the first connecting point is connected with the anti-static ITO, and the second connecting point is connected with a common electrode of the array substrate; or,
the second connection point is connected with the anti-static ITO, and the first connection point is connected with a common electrode of the array substrate.
5. The liquid crystal panel according to claim 3, wherein the anti-static ITO further covers a common electrode lead of the array substrate and/or a common electrode lead of a color film substrate.
6. A display device comprising the liquid crystal panel according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220325347 CN202720425U (en) | 2012-07-05 | 2012-07-05 | Liquid crystal display (LCD) panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220325347 CN202720425U (en) | 2012-07-05 | 2012-07-05 | Liquid crystal display (LCD) panel and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202720425U true CN202720425U (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220325347 Expired - Lifetime CN202720425U (en) | 2012-07-05 | 2012-07-05 | Liquid crystal display (LCD) panel and display device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202720425U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267904A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Display panel |
| CN109375439A (en) * | 2018-12-20 | 2019-02-22 | 武汉华星光电技术有限公司 | Array substrate and display panel |
| CN112530937A (en) * | 2020-12-02 | 2021-03-19 | Tcl华星光电技术有限公司 | Electrostatic protection circuit and display panel |
| CN113835253A (en) * | 2021-09-09 | 2021-12-24 | 浙江泰嘉光电科技有限公司 | Transparent electrode and liquid crystal panel with electrostatic protection function |
-
2012
- 2012-07-05 CN CN 201220325347 patent/CN202720425U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267904A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Display panel |
| CN109375439A (en) * | 2018-12-20 | 2019-02-22 | 武汉华星光电技术有限公司 | Array substrate and display panel |
| CN112530937A (en) * | 2020-12-02 | 2021-03-19 | Tcl华星光电技术有限公司 | Electrostatic protection circuit and display panel |
| WO2022116307A1 (en) * | 2020-12-02 | 2022-06-09 | Tcl华星光电技术有限公司 | Electrostatic protection circuit and display panel |
| CN112530937B (en) * | 2020-12-02 | 2022-09-27 | Tcl华星光电技术有限公司 | Electrostatic protection circuit and display panel |
| US11776457B2 (en) | 2020-12-02 | 2023-10-03 | Tcl China Star Optoelectronics Technology Co., Ltd | Electrostatic protection circuit and display panel |
| CN113835253A (en) * | 2021-09-09 | 2021-12-24 | 浙江泰嘉光电科技有限公司 | Transparent electrode and liquid crystal panel with electrostatic protection function |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130206 |